Computer display screen portion with transitional graphical user interface



FIG. 1 is a front view of a computer display screen portion with transitional graphical user interface, showing a first image in a sequence of a first embodiment;

FIG. 2 is a second image thereof;

FIG. 3 is a third image thereof;

FIG. 4 is a front view of the computer display screen portion with transitional graphical user interface, showing a first image in a sequence of a second embodiment;

FIG. 5 is a second image thereof;

FIG. 6 is a third image thereof;

FIG. 7 is a front view of the computer display screen portion with transitional graphical user interface, showing a first image in a sequence of a third embodiment;

FIG. 8 is a second image thereof;

FIG. 9 is a third image thereof;

FIG. 10 is a front view of the computer display screen portion with transitional graphical user interface, showing a first image in a sequence of a fourth embodiment;

FIG. 11 is a second image thereof; and,

FIG. 12 is a third image thereof.

The subject matter in this patent includes a process or period in which an image changes into another image. The process or period in which an image transitions to another image forms no part of the claimed design.

The broken lines illustrate environment and form no part of the claimed design. 

CLAIM The ornamental design for a computer display screen portion with transitional graphical user interface, as shown and described. 